A six-month follow-up study of maternal anxiety and depressive symptoms among Japanese.

Background: Maternal psychological distress has been widely studied, but epidemiologic data based on follow-up studies of maternal psychological distress remain insufficient in Japan. The objective of this study was to estimate the prevalence of anxiety and depressive symptoms among child-rearing women in Japan at two time-points after childbirth. Methods: A self-administered questionnaire was delivered on two occasions to 2,657 women who had given birth in 2004: first when their infants were 3-4 months old and then again when their infants were 9- 10 months old. The questionnaire included the Hospital Anxiety and Depression Scale (HADS; Japanese version) to estimate the level of maternal psychological distress. Results: The total percentage of women with anxiety symptoms as assessed by a HADS score of 8+ was 26.2 % at 3-4 months of age, and 26.1 % at 9-10 months. Among the women without anxiety symptoms at 3-4 months, 11.6 % showed anxiety symptoms at 9-10 months. The total percentage of depressive symptoms was 19.0 % at 3-4 months, and 24.0 % at 9-10 months. Among the women without depressive symptoms at 3-4 months, 14.0 % showed depressive symptoms at 9-10 months. Conclusion: Anxiety symptoms in mothers appeared to persist from 3-4 months to 9-10 months after childbirth, while depressive symptoms tended to be more common at 9-10 months after childbirth. Nevertheless, the prevalence of anxiety symptoms was higher than that of depressive symptoms.